EP1028166A3 - Composition for hindering the formation of iron oxides in steel-melting slag and EAF scrap- based steelmaking process using the same - Google Patents

Composition for hindering the formation of iron oxides in steel-melting slag and EAF scrap- based steelmaking process using the same Download PDF

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Publication number
EP1028166A3
EP1028166A3 EP20000200434 EP00200434A EP1028166A3 EP 1028166 A3 EP1028166 A3 EP 1028166A3 EP 20000200434 EP20000200434 EP 20000200434 EP 00200434 A EP00200434 A EP 00200434A EP 1028166 A3 EP1028166 A3 EP 1028166A3
Authority
EP
European Patent Office
Prior art keywords
composition
scrap
steel
eaf
hindering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20000200434
Other languages
German (de)
French (fr)
Other versions
EP1028166A2 (en
EP1028166B1 (en
Inventor
Marcello Bellicini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minerals & Metals Italia SpA
Original Assignee
Minerals & Metals Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minerals & Metals Italia SpA filed Critical Minerals & Metals Italia SpA
Publication of EP1028166A2 publication Critical patent/EP1028166A2/en
Publication of EP1028166A3 publication Critical patent/EP1028166A3/en
Application granted granted Critical
Publication of EP1028166B1 publication Critical patent/EP1028166B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—Processes yielding slags of special composition
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/076—Use of slags or fluxes as treating agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Mold Materials And Core Materials (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

A composition comprising from 35 to 50 wt-% of C, from 10 to 20 wt-% of Al, from 25 to 40 wt-% of Al2O3, from 0 to 3 wt-% of CaO and from 0 to 3 wt-% of MgO, provided however that the combined amount of CaO and MgO is of from 1 to 6%. A process for preparing such composition as well as a process for using such composition in the melting of scrap iron in an electric furnace with the aim of decreasing iron losses due to oxidation and of lowering iron oxide content of steel melting slag.
EP20000200434 1999-02-12 2000-02-09 Composition for hindering the formation of iron oxides in steel-melting slag and EAF scrap- based steelmaking process using the same Expired - Lifetime EP1028166B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI990286 1999-02-12
IT1999MI000286 IT1308183B1 (en) 1999-02-12 1999-02-12 COMPOSITION CAPABLE OF OBSTACULATING THE FORMATION OF IRON OXIDS STEEL CASTING DIES AND PROCEDURE FOR OBTAINING SCORIE A

Publications (3)

Publication Number Publication Date
EP1028166A2 EP1028166A2 (en) 2000-08-16
EP1028166A3 true EP1028166A3 (en) 2000-11-02
EP1028166B1 EP1028166B1 (en) 2003-11-19

Family

ID=11381874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000200434 Expired - Lifetime EP1028166B1 (en) 1999-02-12 2000-02-09 Composition for hindering the formation of iron oxides in steel-melting slag and EAF scrap- based steelmaking process using the same

Country Status (5)

Country Link
EP (1) EP1028166B1 (en)
AT (1) ATE254670T1 (en)
DE (1) DE60006596T2 (en)
ES (1) ES2209757T3 (en)
IT (1) IT1308183B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2222971T3 (en) * 2001-08-03 2005-02-16 MINERALS & METALS ITALIA S.P.A. COMPOSITION TO REDUCE THE FORMATION OF IRON OXIDES IN THE STEEL ESCORIA IN FUSION AND PROCEDURE TO OBTAIN AN ESCORIA WITH LOW CONTENT OF IRON OXIDES.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060406A (en) * 1975-07-16 1977-11-29 Foseco International Limited Arc steelmaking
JPS60152611A (en) * 1984-01-18 1985-08-10 Nippon Steel Corp Method for modifying slag
JPH01139714A (en) * 1987-11-26 1989-06-01 Meisei Kako Kk Steel refining agent and steel refining method
RU2000344C1 (en) * 1991-12-10 1993-09-07 Геннадий Алексеевич Лазарев Binder for making of chromite-aluminocoked briquettes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060406A (en) * 1975-07-16 1977-11-29 Foseco International Limited Arc steelmaking
JPS60152611A (en) * 1984-01-18 1985-08-10 Nippon Steel Corp Method for modifying slag
JPH01139714A (en) * 1987-11-26 1989-06-01 Meisei Kako Kk Steel refining agent and steel refining method
RU2000344C1 (en) * 1991-12-10 1993-09-07 Геннадий Алексеевич Лазарев Binder for making of chromite-aluminocoked briquettes

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198928, Derwent World Patents Index; Class M24, AN 1989-202082, XP002146621 *
DATABASE WPI Section Ch Week 199406, Derwent World Patents Index; Class L02, AN 1994-046665, XP002146622 *
LEE F T ET AL: "STUDY ON THE REDUCTION BEHAVIOUR OF FEO IN EAF SLAG", STEEL TIMES INTERNATIONAL,GB,FMJ INTERNATIONAL PUBLICATIONS, REDHILL, SURREY, ENGLAND, vol. 19, no. 1, 1995, pages 20 - 21,24-25, XP000498035, ISSN: 0143-7798 *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 317 (C - 319) 12 December 1985 (1985-12-12) *

Also Published As

Publication number Publication date
ITMI990286A1 (en) 2000-08-12
DE60006596D1 (en) 2003-12-24
EP1028166A2 (en) 2000-08-16
IT1308183B1 (en) 2001-12-07
ES2209757T3 (en) 2004-07-01
DE60006596T2 (en) 2004-09-23
ATE254670T1 (en) 2003-12-15
EP1028166B1 (en) 2003-11-19

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